I agree that there's no way TODAY you can get a vehicle in a few weeks. You also can't find anything on dealer lots. Today is an anomaly. Think back three years. Was it possible then? It was, because I did it. Will it be possible in a couple of years? I believe it will, as supply/demand/pricing will settle. Maybe not exactly where it was, but it will settle.
I had to have a safety recall performed on my Dodge truck. The dealer kept saying they couldn't get parts, they were not willing to do anything for me other than put me on a list for replacement when the parts would arrive. "Don't worry, the steering on your 7500 lb vehicle will probably break at parking lot speeds". Eventually, a full year later, I got a replacement because I happened to call on the day some parts arrived. That list of people they were going to call was complete fiction, it was luck of the draw. In this case, the dealer was actively in the way of me getting a mandated safety repair because I couldn't deal with the manufacturer of the parts directly. That's the problem, the dealer is between the customer and the manufacturer. That buffer prevented me from talking to anyone who could actually do something. The dealership didn't have to worry about their reputation because hey, it wasn't their fault, it was the manufacturer. That's the lack of accountability. Of course the manufacturer will tell you to contact a dealer, they have to. That's the arrangement the dealers have made with the manufacturers and vice versa. We, the people paying the money for the product, don't have the option to do it any other way. Some of us want that option.
Would another dealership have acted differently? Possibly. I have had a different dealer go far out of their way to make sure I could get home after a scheduled warranty repair was not performed in time. But you know what? The delay was their fault. They knew I was coming, they knew when, they knew what work was being performed and they knew I had to travel 5 hours to get there. So they were simply taking responsibility for their own actions. So the dealer wasn't a buffer here, they were the actual problem they were trying to solve.
The only reason that dealers are the only ones allowed to perform warranty service is because the manufacturer says so. There is nothing stopping a manufacturer from anointing other shops with that same power. That's important to remember, just because things are done one way today does not mean they have to be done that way tomorrow, and the limitation is not a real limitation but an artificial one.
Pricing - should I have to do a bunch of research to find out who is offering the product I want at the best price, and then walk in to face a professional negotiator? Or should I - or anyone - be able to walk into a big chain dealer anywhere and get the same price? I can buy a laptop that way. Why can't I buy a car that way? Are they really so different other than an extra zero on the price tag?
I understand that right now things are very difficult in the dealership business and that going direct to manufacturer would not really help get cars to people right now, as nobody has any inventory. But again, right now we are in an anomaly. It won't maintain. So we have to look at how things have worked up until the last year or so to determine how they might work a year or two from now.